51315-5893-Performance of Organic Corrosion Inhibitors on Carbon Steels and High Alloys in 4M Hydrochloric Acid

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Product Number: 51315-5893-SG

ISBN: 5893 2015 CP

Author: Evgeny Barmatov

Publication Date: 2015

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Matrix acidizing of oil and gas reservoirs is a widely established technique to increase hydrocarbon production. Strong mineral acids such as HCl or HCl/HF mixtures are injected into the well at high concentrations. For this application corrosion inhibitors are enabling because uninhibited matrix acidizing treatment fluids would induce severe corrosion of downhole equipment. A broad range of organic film-forming corrosion inhibitors have been developed to retard the acid corrosion of production tubing and coiled tubing through which the acidizing fluids are injected. In this paper the corrosion inhibition of polymerizable organic corrosion inhibitors for a coiled tubing low carbon steel (HS80) mild carbon steel (N80) high alloy (13Cr) and Duplex (2205) casing steels in 4M hydrochloric acid solution at 80°C was investigated by weight loss and electrochemical techniques. This paper summarizes structure-properties relationships for various polymerisable organic corrosion inhibitors including acetylenic alcohols and derivatives of cinnamic acid i.e. trans-cinnamaldehyde and cinnamonitrile. The influence of metal microstructure on the efficiency of film forming corrosion inhibitors and the synergetic behavior with quaternary ammonium cations is discussed.